Car-bolster



(No Model.) n v 2 Sheets-Sheet 1.

W. CASE.

v GAR BOLSTBR.

No. 537,671. Patented Apr. 16, 1895i.

W. CASE.

GAR BoLsTBR. l

(No Model.)

2 Sheets-Sheet 2.

Patented Apr. 16, 1895.

wdl

STATES PATENT WILLIAM CASE, OF CHICAGO, ILLINOIS,AASSIGNOR TO THE NATIONAL MALLEABLE CASTING COMPANY, OF CLEVELAND, OHIO.

CAR-BOLSTER.

SPECIFICATION forming part of Letters Patent No. 537,671, dated April 16, 1 895.

Application filed August 7, 1894. Serial No. 519,646. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM CASE, of Chicago, Illinois, have invented certain new and useful Improvements in Car-Bolsters, of which the following is a specification.

The object of my invention is to provide a simple, economical and efficient car bolster; and the invention consists in the features and combinations hereinafter described and claimed.

In the drawings, Figure 1 represents a plan View of my improvement, looking at it from the top; Fig. 2, a side elevation thereof; Fig. 3, an inverted plan View; and Figs. 4, 5, 6 and '7, transverse sections taken on the lines 4, 5, 6 and 7, respectively, of Fig. 2.

I prefer to make my improved bolster substantially in one integral piece of cast malleable iron or steel, though for convenience in size and putting together it may be made in two or more parts.

In constructing my improved bolster, I make it of a tubular member or members, A, substantially circular in cross section, and provide it with a trussed bearing flange, A', be-

tween which and the circular member is a segmental web, B. The tubular member of the bolster is provided with an inner longitudinal web or webbing, C, preferably arranged in line with the segmental Web, so that both form to all intents and purposes a continuous web or line from the outer trussed bearing flange to the upper interior surface of the tubular member. The trussed bearing flange, A', is provided with a number of recessed seats, a', to prevent lateral displacement of the truss rods. The tubular member is also provided with a center plate bearing, D, adapted to receive the ordinary center plate-which may be attached in any convenient manner. The ends of the tubular member are provided with side bearing seats, E, for the `reception of side bearing plates, which may be readily and removably secured thereto. It is well known that the center plates and side bearings of car holsters are subjected to considerable Wear, so that if they are made integral with the bolster itself, as soon as they become worn or broken the efliciency of the bolster is impaired, making it necessary to replace it. In my construction they are removably secured to the bolster proper, so that when it is deemed necessary they may be removed and replaced by new ones, without necessitating the destruction or removal of the entire bolster. The tubular member, as at c, is cambered from the center to each end, to permit a shape which will the more readily and efficiently withstand the strain incident to its use.

Cast integral with the body of the bolster and the trussed bearing flange are spring seats, G, adapted to receive a nest of spiral springs which are interposed between it and the spring plank. The bolster ends are provided with fianged guides, g, which fit the transom columns and assist in positioning the bolster.

Passing through the ends of the bolster, and underneath it so as to contact and rest in the trussed bearing flange, is a truss rod, H, which is provided with suitable nuts, h, at either end to rigidly secure the parts together. These nuts may be provided with lock nuts-not shown-to more Iirm'ly hold and secure the rods in position. The center plate seat is provided with a perforation or opening, I, for the reception of a king bolt, and the s trut portion, fi, with a longitudinal opening, t', to permit a ready inspection at all times of the king bolt.

The advantages of my construction are that it provides a simple and economical car bolster, which is particularly adapted to withstand the strains incident to its use by distributing them throughout the entire structure-the cambering of the tubular member permitting the use of a low center plate, and also presenting the strongest possible struct-l ure to withstand the compression strain.

While I have shown and described the spring seats in this specification, I do not claim them broadly herein, as the same are described and claimed broadly in an application for car holsters executed and filed simulta neously herewith.

I claim- 1. A car bolster, composed of a tubular member cambered from the center to each end thereof, a iiange portion, and a web portion ICO interposed between the tubular cambered members and the ilange portion, substantially as described.

2. A car bolster, composed of a hollow tubular member cambered from the center to each end thereof, a bearing flange, a strengthening portion interposed between the bearing flange and tubular member and formed integral therewith, and a truss rod passed under the bearing flange to contact the same and secured to the ends of the tubular member, substantially as described.

3. A carbolster composed of a tubular member cambered from the center to each end thereof, a iiange portion at an angle to the tubular member, and a segmental web interposed between the tubular member and the flange portion, the whole made in one integral piece, substantially as described.

4. In car bolsters, the combination of a body portion composed of a tubular member, a bearing flange, a segmental web interposed between such iiange and the tubular member and cast integral therewith, with a truss rod, and means for securing such truss rod at its ends to the body portion of the bolster, substantially as described.

5. In car bolsters, the combination of a body portion composed of a tubular member provided with an inner longitudinal strengthen ing rib, a bearing iange, a segmental web interposed between such bearing an ge and the tubular member and cast integral with such portions, with a truss rod secured to the ends of the tubular portion and passed underneath to contact the bearing iange, and means for securely holding the body portion of the bol- Aster and truss rod together, substantially as described.

6. A car bolster having its body portion formed of one integral casting, consisting of a tubular member provided with center and side bearing seats, such tubular portion being cambered from the center to the ends thereof, a bearing flange and segmental web interposed between such bearing iange and tubular member, and spring plate seats at each end of the body portion, in combination with a truss rod contacting the bearing flanges and secured to the body portion at each end thereof, and means for securing the truss rod to the body portion of the bolster, substantially as described.

7. A car bolster having its body portion composed of one integral casting, consisting v of a tubular member, a center strengthening rib in the same, center and side bearing seats, spring seats at each end of the body portion, a bearing flange and segmental web interposed between such bearing ange in line with and forming a continuation in the inner strengthening rib of the tubular member, in combination with a truss rod contacting the bearing flange and secured to the ends of the body portion, and means for rigidly securing the body portion and truss rod of the bolster together, substantially as described.

WILLIAM CASE. Witnesses:

THOMAS F. SHERIDEN, THOMAS B. MCGREGOR. 

